spi: pl022: Add missing dma_filter field kerneldoc

Add kerneldoc for dma_filter field in struct pl022_ssp_controller.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https

spi: pl022: Add missing dma_filter field kerneldoc

Add kerneldoc for dma_filter field in struct pl022_ssp_controller.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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spi: pl022: Use typedef for dma_filter_fn

Use existing typedef for dma_filter_fn to avoid duplicating type
definition.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: http

spi: pl022: Use typedef for dma_filter_fn

Use existing typedef for dma_filter_fn to avoid duplicating type
definition.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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spi: pl022: Use GPIOs looked up by the core

The SPI core looks up GPIO lines from the device tree,
so let's stop trying to do that on our own and rely
on the core to do this for us.

In addition to

spi: pl022: Use GPIOs looked up by the core

The SPI core looks up GPIO lines from the device tree,
so let's stop trying to do that on our own and rely
on the core to do this for us.

In addition to the GPIO line we also need to keep
track of the chip select index separately, as the native
chip select needs this index. The driver was reusing
the same GPIO array for native chip select indices,
so keep this in a separate state variable instead.

The facility to pass in custom GPIO lines from the
platform data can go, because even if we do have
out-of-tree code that want to use platform data, they
can soon pass in GPIOs using machine GPIO descriptor
tables which will be available after the next step
when we convert the driver to using GPIO descriptors.

The implicit inclusion of <linux/of.h> is made
explicit as we no longer need to include <linux/of_gpio.h>.

Signed-off-by: Linus Walleij <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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spi: pl022: Drop custom per-chip cs_control

Drop the custom cs_control() assigned through platform data,
we have no in-tree users and the only out-of-tree use I have
ever seen of this facility is to

spi: pl022: Drop custom per-chip cs_control

Drop the custom cs_control() assigned through platform data,
we have no in-tree users and the only out-of-tree use I have
ever seen of this facility is to pull GPIO lines, which is
something the driver can already do for us.

Signed-off-by: Linus Walleij <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

Based on 3 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

Based on 3 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version [author] [kishon] [vijay] [abraham]
[i] [kishon]@[ti] [com] this program is distributed in the hope that
it will be useful but without any warranty without even the implied
warranty of merchantability or fitness for a particular purpose see
the gnu general public license for more details

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version [author] [graeme] [gregory]
[gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
[kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
[hk] [hemahk]@[ti] [com] this program is distributed in the hope
that it will be useful but without any warranty without even the
implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Richard Fontana <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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spi/pl022: Add chip select handling via GPIO

This patch adds the ability for the driver to control the chip select directly.
This enables independence from cs_control callbacks. Configurable via
pl

spi/pl022: Add chip select handling via GPIO

This patch adds the ability for the driver to control the chip select directly.
This enables independence from cs_control callbacks. Configurable via
platform_data, to be extended as DT in the following patch.

Based on the initial patch by Alexandre Pereira da Silva <[email protected]>

Signed-off-by: Roland Stigge <[email protected]>
Acked-by: Alexandre Pereira da Silva <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Mark Brown <[email protected]>

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spi/pl022: cleanup pl022 header documentation

Remove the unused fields from struct ssp_config_chip that was removed
before
Add bus_id documentation to pl022_ssp_controller

Signed-off-by: Alexandre

spi/pl022: cleanup pl022 header documentation

Remove the unused fields from struct ssp_config_chip that was removed
before
Add bus_id documentation to pl022_ssp_controller

Signed-off-by: Alexandre Pereira da Silva <[email protected]>
Signed-off-by: Roland Stigge <[email protected]>

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spi/pL022: include types.h to remove compilation warnings

linux/pl022.h uses definitions like, u8, u16, etc, which have dependency of
types.h file, which isn't included in it. So, we get compilation

spi/pL022: include types.h to remove compilation warnings

linux/pl022.h uses definitions like, u8, u16, etc, which have dependency of
types.h file, which isn't included in it. So, we get compilation warnings.

This patch includes types.h there to fix these warnings.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

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device.h: audit and cleanup users in main include dir

The <linux/device.h> header includes a lot of stuff, and
it in turn gets a lot of use just for the basic "struct device"
which appears so often.

device.h: audit and cleanup users in main include dir

The <linux/device.h> header includes a lot of stuff, and
it in turn gets a lot of use just for the basic "struct device"
which appears so often.

Clean up the users as follows:

1) For those headers only needing "struct device" as a pointer
in fcn args, replace the include with exactly that.

2) For headers not really using anything from device.h, simply
delete the include altogether.

3) For headers relying on getting device.h implicitly before
being included themselves, now explicitly include device.h

4) For files in which doing #1 or #2 uncovers an implicit
dependency on some other header, fix by explicitly adding
the required header(s).

Any C files that were implicitly relying on device.h to be
present have already been dealt with in advance.

Total removals from #1 and #2: 51. Total additions coming
from #3: 9. Total other implicit dependencies from #4: 7.

As of 3.3-rc1, there were 110, so a net removal of 42 gives
about a 38% reduction in device.h presence in include/*

Signed-off-by: Paul Gortmaker <[email protected]>

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spi/pl022: Add high priority message pump support

This switches the PL022 worker to a kthread in order to get
hold of a mechanism to control the message pump priority. On
low-latency systems elevati

spi/pl022: Add high priority message pump support

This switches the PL022 worker to a kthread in order to get
hold of a mechanism to control the message pump priority. On
low-latency systems elevating the message kthread to realtime
priority give a real sleek response curve. This has been
confirmed by measurements. Realtime priority elevation for
a certain PL022 port can be requested from platform data.

Cc: Mark Brown <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Signed-off-by: Chris Blair <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

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spi/pl022: add support for pm_runtime autosuspend

Adds support for configuring the spi bus to use autosuspend for
runtime power management. This can reduce the latency in starting an
spi transfer by

spi/pl022: add support for pm_runtime autosuspend

Adds support for configuring the spi bus to use autosuspend for
runtime power management. This can reduce the latency in starting an
spi transfer by not suspending the device immediately following
completion of a transfer. If another transfer then takes place before
the autosuspend timeout, the call to resume the device can return
immediately rather than needing to risk sleeping in order to resume
the device.

Reviewed-by: Viresh Kumar <[email protected]>
Signed-off-by: Chris Blair <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>

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spi/pl022: get rid of chipinfo dev pointer

What is the dev pointer doing inside the platform data anyway.
We have another pointer to the actual device at hand, use that.

Signed-off-by: Linus Wallei

spi/pl022: get rid of chipinfo dev pointer

What is the dev pointer doing inside the platform data anyway.
We have another pointer to the actual device at hand, use that.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

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spi/pl022: Add spi->mode support to AMBA SPI driver

This patch adds spi->mode support for the AMBA pl022 driver and
allows spidev to correctly alter SPI modes. Unused fields used in
the pl022 header

spi/pl022: Add spi->mode support to AMBA SPI driver

This patch adds spi->mode support for the AMBA pl022 driver and
allows spidev to correctly alter SPI modes. Unused fields used in
the pl022 header file for the pl022_config_chip have been removed.

The ab8500 client driver selects the data transfer size instead
of the platform data.

For platforms that use the amba pl022 driver, the unused fields
in the controller data structure have been removed and the .mode
field in the SPI board info structure is used instead.

Signed-off-by: Kevin Wells <[email protected]>
Tested-by: Linus Walleij <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

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spi/pl022: add PrimeCell generic DMA support

This extends the PL022 SSP/SPI driver with generic DMA engine
support using the PrimeCell DMA engine interface. Also fix up the
test code for the U300 pl

spi/pl022: add PrimeCell generic DMA support

This extends the PL022 SSP/SPI driver with generic DMA engine
support using the PrimeCell DMA engine interface. Also fix up the
test code for the U300 platform.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

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spi/pl022: add support for the PL023 derivate

This adds support for a further ST variant of the PL022 called
PL023. Some differences in the control registers due to being
stripped down to SPI mode o

spi/pl022: add support for the PL023 derivate

This adds support for a further ST variant of the PL022 called
PL023. Some differences in the control registers due to being
stripped down to SPI mode only, and a new clock feedback sample
delay config setting is available.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

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spi/pl022: fix up differences between ARM and ST versions

The PL022 SPI driver did not cleanly separate between the
original unmodified ARM version and the ST Microelectronics
versions. Split this m

spi/pl022: fix up differences between ARM and ST versions

The PL022 SPI driver did not cleanly separate between the
original unmodified ARM version and the ST Microelectronics
versions. Split this more cleanly and fix some whitespace
moaning from checkpatch at the same time.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

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ARM: 5678/1: SSP/SPI PL022 polarity terminology fix

The definition of the SPI clock phase for the Motorola mode of
the PL022 driver was incorrect: the spec had been interpreted as
data being recieve

ARM: 5678/1: SSP/SPI PL022 polarity terminology fix

The definition of the SPI clock phase for the Motorola mode of
the PL022 driver was incorrect: the spec had been interpreted as
data being recieved on rising or falling edge of the clocks while
the correct interpretation is that data can be recieved on the
first or second edge transition, falling or rising depending on
the polarity setting.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>

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[ARM] 5546/1: ARM PL022 SSP/SPI driver v3

This adds a driver for the ARM PL022 PrimeCell SSP/SPI
driver found in the U300 platforms as well as in some
ARM reference hardware, and in a modified versi

[ARM] 5546/1: ARM PL022 SSP/SPI driver v3

This adds a driver for the ARM PL022 PrimeCell SSP/SPI
driver found in the U300 platforms as well as in some
ARM reference hardware, and in a modified version on the
Nomadik board.

Reviewed-by: Alessandro Rubini <[email protected]>
Reviewed-by: Russell King <[email protected]>
Reviewed-by: Baruch Siach <[email protected]>

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>

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